<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>

    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>

    <script type="text/babel">
        class MyComponent extends React.Component{
            constructor(props){
                super(props)
                // this.state= {ishot:true,wind:'微风'}
                // this.changeweather = this.changeweather.bind(this)    
            }
            render(){
                // console.log(this);
                const {ishot} = this.state
                return <h1 style={{cursor:'pointer'}} onClick={this.changeweather}>今天天气很{ishot?'炎热':'寒冷'}</h1>
            }
            state= {ishot:true,wind:'微风'}
            changeweather= ()=>{
                // console.log('123124',this);
                const {ishot} = this.state
                this.setState({ishot:!ishot})
            }
        }
        ReactDOM.render(<MyComponent/>, document.getElementById('test'));

    </script>
</body>
</html>